Continuity mistake: Beryl gags Nina's mouth with a white cloth that extends up to her nose and wraps her mouth with a tan cloth. Then only the tan cloth extends up to Nina's nose, and the white cloth is not visible. (Nina's arms are in restraints, so she cannot remove the white cloth.) (00:47:52 - 00:48:32)
Continuity mistake: Inside the building, Nina is at different distances from the man on the bench, ranging from about one body's width to a few widths away (while accounting for her limited movement). (00:15:15)